Konica Minolta bizhub PRO 950 - Manual (Page 143)

Mac OS 9 Printing
bizhub PRO 950 Printer Driver 8-13
If you enter this username later again:
Click the Keychain button to ask Keychain for this username.
Depending on Keychain’s configuration, Keychain will prompt you for the
Keychain password and to grant the application access to the requested
password. On success, Keychain fills the password field with the password.